Linux System Engineer

The Defense Sector at Leidos is seeking a Linux System Engineer to support a fast-paced program with the Air Force Life Cycle Management Center (AFLCMC). In this role you will design deploy maintain and optimize enterprise infrastructure supporting classified mission systems. Working closely with cross-functional teams youll help deliver reliable secure and scalable infrastructure while supporting system deployments lifecycle management automation and operational readiness.

This position requires 100% on-site support in Oklahoma City OK.

Why This Role Matters

• Modern mission systems depend on resilient well-engineered infrastructure. As mission requirements evolve organizations face increasing complexity from system integration infrastructure modernization and the need to deliver capabilities efficiently without sacrificing reliability or security.
• As a Linux System Engineer youll help build and sustain the foundational platforms that enable mission success. Youll improve automation standardization and operational efficiency while delivering infrastructure that is reliable scalable and easier to deploy manage and maintain across enterprise environments.

What Youll Bring

• You have experience supporting enterprise or classified infrastructure with a strong understanding of Windows and Linux systems virtualization enterprise core services storage networking and systems integration. You are comfortable deploying maintaining and troubleshooting complex environments while improving automation reliability and operational efficiency.
• Most importantly youre a self-starter who values accountability continuous improvement and technical excellence. You exercise sound judgment work effectively with minimal oversight and serve as a trusted engineering partner to both technical teams and leadership.
• If youre looking for an opportunity to modernize mission-critical infrastructure influence technical direction and make a measurable impact supporting national defense wed like to talk with you.

Primary Responsibilities:

• Install configure maintain and patch physical and virtual Linux servers.
• Monitor troubleshoot and optimize system performance to ensure high availability reliability and operational readiness.
• Manage operating system updates security hardening and configuration changes in accordance with DoD policies and standards.
• Support system backups disaster recovery and data integrity to ensure business continuity.
• Administer system access user accounts and security configurations.
• Collaborate with cross-functional teams to support system deployments software integration and infrastructure modernization.
• Maintain accurate system documentation configuration records and operational procedures.
• Respond to and resolve infrastructure and system issues including performance availability and security-related incidents.
• Promote knowledge sharing continuous improvement and technical collaboration across the team.

Basic Qualifications:

• US Citizen with at least a Top Secret clearance and the ability to obtain a SCI prior to your start date
• Bachelors degree with 4 years of experience or Masters degree with 2 years of experience. Additional years of experience will be considered in lieu of a degree
• DoD 8140 Intermediate certification or DoD 8570 IAM Level II certification (or higher)
• Foundational experience with cloud platforms such as AWS and Azure
• Experience administering Linux and Windows environments including networking fundamentals and common protocols (HTTP HTTPS SSL/TLS SMTP DNS).
• Problem-solving and analytical skills with the ability to bring structure and clarity to ambiguous or unstructured information.
• Self-starter that can work independently while possessing excellent interpersonal verbal and written communication skills.

Preferred Qualifications:

• US Citizen with an active TS/SCI security clearance
• Linux certifications (RHCSA RHCE CompTIA Linux)
• Experience administering Red Hat Satellite
• Experience with virtualization platforms including VMware ESXi and Microsoft Hyper-V
• Experience with enterprise infrastructure services including PKI certificate management RSA Authentication Manager RDS and VDI
• Experience automating system administration using Ansible including developing custom playbooks
• Familiarity with ITSM platforms such as ServiceNow and Jira Service Management

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If youre looking for comfort keep scrolling. At Leidos we outthink outbuild and outpace the status quo because the mission demands it. Were not hiring followers. Were recruiting the ones who disrupt provoke and refuse to fail. Step 10 is ancient history. Were already at step 30 and moving faster than anyone else dares.

The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job education experience knowledge skills and abilities as well as internal equity alignment with market data applicable bargaining agreement (if any) or other law.